Move mediastream module to oilpan transition types

Source/platform/mediastream/MediaStreamTrackSourcesRequest.cpp

Index: Source/platform/mediastream/MediaStreamTrackSourcesRequest.cpp
diff --git a/Source/modules/mediastream/RTCSessionDescriptionCallback.idl b/Source/platform/mediastream/MediaStreamTrackSourcesRequest.cpp
similarity index 89%
copy from Source/modules/mediastream/RTCSessionDescriptionCallback.idl
copy to Source/platform/mediastream/MediaStreamTrackSourcesRequest.cpp
index 59ffe441a6758bedde67a1101efbb550a921affc..eee3cf3c0229cdd66d903fddfeafedf91ca64c5b 100644
--- a/Source/modules/mediastream/RTCSessionDescriptionCallback.idl
+++ b/Source/platform/mediastream/MediaStreamTrackSourcesRequest.cpp
@@ -28,7 +28,11 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-callback interface RTCSessionDescriptionCallback {
-    void handleEvent(RTCSessionDescription sdp);
-};
+#include "config.h"
+#include "platform/mediastream/MediaStreamTrackSourcesRequest.h"
 
+namespace WebCore {
+
+DEFINE_GC_INFO(MediaStreamTrackSourcesRequest);
+
+} // namespace WebCore